Jason Aldean adds second concert after instant sell-out

FILE - In this April 7, 2013 file photo, singer George Strait performs at the 48th Annual Academy of Country Music Awards at the MGM Grand Garden Arena in Las Vegas. The 2014 Academy of Country Music Awards in Las Vegas will air live Sunday night, April 6, 2014, from 8-11 p.m. EDT on CBS. Several awards, including top honor entertainer of the year, will be announced during the broadcast, to be hosted by Blake Shelton and Luke Bryan. Shelton, Bryan, George Strait, Miranda Lambert, Jason Aldean, Keith Urban, Tim McGraw, Shakira and Stevie Nicks are scheduled to perform. (Photo by Chris Pizzello/Invision/AP, file)